CN216788671U - Diaphragm pump - Google Patents

Abstract

The present invention provides a diaphragm pump, comprising: the pump body comprises a shell and a diaphragm movably arranged in the shell; the eccentric assembly is in driving connection with the diaphragm so as to drive the diaphragm to move back and forth; an inner rotor motor; the input end of the reduction gearbox is connected with a motor shaft of the inner rotor motor, and the output end of the reduction gearbox is connected with the eccentric component. By adopting the scheme, the pump body is driven by the inner rotor motor, the overall weight of the diaphragm pump is reduced, the processing cost is reduced, the miniaturization of a product is realized, and the applicability and the service life of the diaphragm pump are improved. Through setting up the reducing gear box for the exportable scope of inner rotor motor wholly diminishes, makes the output scope of inner rotor motor can be by make full use of, when not influencing the interval upper limit value of flow control of diaphragm pump, has reduced the interval lower limit of flow control, and then has enlarged the interval scope of flow control, has improved the suitability of diaphragm pump.

Description

Diaphragm pump

Technical Field

The utility model relates to the technical field of diaphragm pumps, in particular to a diaphragm pump.

Background

Most of the diaphragm pumps in the current market adopt a mode that an eccentric shaft is directly driven by a motor so as to drive a diaphragm to work, the adjustable flow range of the connection mode is limited, especially the lower limit of the flow regulation range can be limited by the lowest output of the motor and can not be adjusted downwards any more, the motor output value of the upper limit of the flow regulation range is not the maximum output of the motor, and the value of the motor on the maximum output still has allowance; and the mode that the motor directly drives in order to satisfy the controllability under moment of torsion and the low rotational speed, can adopt the external rotor motor mostly, and the external rotor motor weight is heavier and the cost is higher, is unfavorable for product miniaturization and product to subtract heavy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a diaphragm pump, which aims to improve the flow regulation range of the diaphragm pump in the prior art.

In order to achieve the above object, the present invention provides a diaphragm pump including: the pump body comprises a shell and a diaphragm movably arranged in the shell; the eccentric assembly is in driving connection with the diaphragm so as to drive the diaphragm to move back and forth; an inner rotor motor; the input end of the reduction box is connected with a motor shaft of the inner rotor motor, and the output end of the reduction box is connected with the eccentric assembly.

Furthermore, the reduction box comprises a bracket and a planetary gear train which is rotatably arranged in a cavity of the bracket, a motor shaft is in driving connection with the planetary gear train, at least one part of the eccentric component is arranged in the bracket, and the eccentric component is connected with the planetary gear train.

Further, the planetary gear train includes input gear and a plurality of planet wheel, and a plurality of planet wheel set up around input gear, a plurality of planet wheel all with input gear engagement, the annular internal tooth that the inside wall of support has, a plurality of planet wheel all with annular internal tooth meshing, motor shaft and input gear fixed connection.

Further, the reducing gear box still includes the ring of nai rubbing, and the ring of nai rubbing sets up in the cavity of support, and the one end butt of the ring of nai rubbing and planet wheel.

Further, the eccentric assembly comprises an eccentric body which is rotatably arranged, the eccentric body comprises an eccentric shaft and a connecting piece which are connected with each other, and the connecting piece is connected with the planetary gear train.

Furthermore, the planetary gear train comprises a plurality of planet gears, the eccentric assembly further comprises a plurality of connecting shafts, the connecting shafts are fixedly arranged on the connecting piece, and the connecting shafts are connected with the planet gears in a one-to-one correspondence mode.

Furthermore, the eccentric body is provided with an avoidance hole, and one end of the motor shaft extends into the avoidance hole; the eccentric assembly further comprises a first bearing and a driving sleeve, the first bearing is located in the driving sleeve, the first bearing is sleeved on the eccentric shaft, and the driving sleeve is in driving connection with the diaphragm.

Further, the diaphragm pump also comprises a supporting part and a second bearing, the supporting part comprises a supporting shaft and a balancing weight arranged on the supporting shaft, one end, far away from the reduction gearbox, of the eccentric shaft is connected with the supporting shaft, the second bearing is sleeved on the supporting shaft, and the second bearing is arranged in the shell.

Further, eccentric subassembly includes eccentric body, mounting bracket, third bearing and locating part, and the eccentric body has annular step, and the third bearing is located the mounting bracket, and the third bearing cover is established on the eccentric body, the inner circle and the annular step butt of third bearing, and the locating part sets up on the mounting bracket, the outer lane and the locating part butt of third bearing.

Further, the diaphragm pump further comprises a first fastener, a second fastener, a first sealing ring and a second sealing ring, the first sealing ring is arranged between the support and the eccentric assembly, the support and the eccentric assembly are connected through the first fastener, the second sealing ring is arranged between the casing and the support of the inner rotor motor, and the casing and the support are connected through the second fastener.

By applying the technical scheme of the utility model, the utility model provides a diaphragm pump, which comprises: the pump body comprises a shell and a diaphragm movably arranged in the shell; the eccentric assembly is in driving connection with the diaphragm so as to drive the diaphragm to move back and forth; an inner rotor motor; the input end of the reduction box is connected with a motor shaft of the inner rotor motor, and the output end of the reduction box is connected with the eccentric assembly. Because the diaphragm pump in the prior art usually adopts a mode that the pump body is directly driven by the motor and is limited by the output range of the direct drive motor, the flow regulation interval of the diaphragm is limited, especially the lower limit value of the flow regulation interval, the output value of the direct drive motor which obtains the upper limit of the flow regulation interval is not the maximum output value of the direct drive motor, and the direct drive motor still has margin on large output. By adopting the scheme, the pump body is driven by the inner rotor motor, the overall weight of the diaphragm pump is reduced, the processing cost is reduced, the miniaturization of a product is realized, and the applicability and the service life of the diaphragm pump are improved. Through setting up the reducing gear box for the exportable scope of inner rotor motor wholly diminishes, makes the output scope of inner rotor motor can be by make full use of, when not influencing the interval upper limit value of flow control of diaphragm pump, has reduced the interval lower limit of flow control, and then has enlarged the interval scope of flow control, has improved the suitability of diaphragm pump.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 illustrates a schematic diagram of a diaphragm pump provided by an embodiment of the present invention;

FIG. 2 shows a partial cross-sectional view of FIG. 1;

FIG. 3 shows a schematic view of the diaphragm pump of FIG. 1 without the pump body;

fig. 4 shows an exploded view of fig. 3.

Wherein the figures include the following reference numerals:

10. a pump body; 11. a housing; 12. a diaphragm;

20. an eccentric assembly; 21. an eccentric body; 211. an eccentric shaft; 212. a connecting member; 22. a connecting shaft; 23. avoiding holes; 24. a first bearing; 25. a drive sleeve; 26. a mounting frame; 27. a third bearing; 28. a limiting member; 29. an annular step;

30. an inner rotor motor; 31. a motor shaft;

40. a reduction gearbox; 41. a support; 411. an annular internal tooth; 42. a planetary gear train; 421. an input gear; 422. a planet wheel; 43. a wear-resistant ring;

50. a support portion; 51. a support shaft; 52. a balancing weight;

61. a second bearing;

71. a first fastener; 72. a second fastener; 73. a first seal ring; 74. and a second seal ring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a diaphragm pump including: a pump body 10, the pump body 10 including a housing 11 and a diaphragm 12 movably disposed within the housing 11; eccentric assembly 20, eccentric assembly 20 is in driving connection with diaphragm 12 to drive diaphragm 12 to and fro; an inner rotor motor 30; the input end of the reduction box 40 is connected with the motor shaft 31 of the inner rotor motor 30, and the output end of the reduction box 40 is connected with the eccentric component 20.

Because the diaphragm pump in the prior art usually adopts a mode of directly driving the pump body by the motor and is limited by the output range of the direct drive motor, the flow regulation interval of the diaphragm 12 is limited, especially the lower limit value of the flow regulation interval, the output value of the direct drive motor which obtains the upper limit of the flow regulation interval is not the maximum output value of the direct drive motor, and the direct drive motor still has a margin on the large output. In this embodiment, the inner rotor motor 30 is used to drive the pump body 10, so that the overall weight of the diaphragm pump is reduced, the processing cost is reduced, the miniaturization of the product is realized, and the applicability and the service life of the diaphragm pump are improved. Through setting up reducing gear box 40 for the exportable scope of inner rotor motor 30 wholly diminishes, makes the exportable scope of inner rotor motor 30 can be by make full use of, when not influencing the interval upper limit value of flow control of diaphragm pump, has reduced the interval lower limit of flow control, and then has enlarged the interval scope of flow control, has improved the suitability of diaphragm pump.

Specifically, the reduction gearbox 40 comprises a bracket 41 and a planetary gear train 42 rotatably arranged in a cavity of the bracket 41, the motor shaft 31 is in driving connection with the planetary gear train 42, at least one part of the eccentric assembly 20 is arranged in the bracket 41, and the eccentric assembly 20 is connected with the planetary gear train 42. In the embodiment, the inner rotor motor 30 realizes speed reduction through the planetary gear train 42 in the reduction box 40, and has simple structure and reliable transmission.

As shown in fig. 2 and 4, the planetary gear train 42 includes an input gear 421 and a plurality of planetary gears 422, the plurality of planetary gears 422 are disposed around the input gear 421, the plurality of planetary gears 422 are all engaged with the input gear 421, the inner side wall of the support 41 has annular inner teeth 411, the plurality of planetary gears 422 are all engaged with the annular inner teeth 411, and the motor shaft 31 is fixedly connected to the input gear 421.

In this embodiment, motor shaft 31 and input gear 421's fixed connection make input gear 421 and motor shaft 31 synchronous rotation, and rethread input gear 421 and a plurality of planet wheel 422's meshing makes a plurality of planet wheel 422 rotations around the motor shaft revolution when, sets up like this, can obtain great drive ratio, and occupation space is little when the speed reduction effect is obvious for diaphragm pump overall structure is compacter. Meanwhile, the movement of the plurality of planet wheels 422 is guaranteed by the arrangement of the annular internal teeth 411, the conditions of collision, abrasion, movement deviation and the like are prevented, and the movement reliability of the diaphragm pump is guaranteed.

Specifically, there are 3 planet gears 422, and the input end of the reduction gearbox 40 is the input gear 421.

As shown in fig. 4, the reduction gearbox 40 further includes a wear-resistant ring 43, the wear-resistant ring 43 is disposed in the cavity of the support 41, and the wear-resistant ring 43 is abutted to one end of the planet wheel 422. Through setting up resistant ring 43 that rubs, prevent that planet wheel 422 from the condition of wearing and tearing appear in the laminating of the inside wall of rotation process and support 41, guarantee reducing gear box 40 planet wheel 422's reliability, extension planet wheel 422's life.

Specifically, one end of the bracket 41 facing the inner rotor motor 30 is provided with a communication hole, the motor shaft 31 fixedly connected with the input gear 421 is arranged through the communication hole, the antifriction ring 43 is arranged at one end of the communication hole in the bracket 41 and is attached to the inner side wall of the bracket 41, the other side of the antifriction ring 43 is attached to the planetary gear train 42, and the service life of the whole planetary gear train 42 is prolonged.

Further, eccentric assembly 20 includes eccentric body 21, eccentric body 21 is rotatably provided, eccentric body 21 includes eccentric shaft 211 and coupling member 212 coupled to each other, and coupling member 212 is coupled to planetary gear set 42. In this way, planetary gear train 42 drives connecting piece 212 to rotate, and further drives eccentric shaft 211 to rotate, so that the structure is simple and the transmission is reliable.

As shown in fig. 4, the planetary gear train 42 includes a plurality of planetary gears 422, the eccentric assembly 20 further includes a plurality of connecting shafts 22, the plurality of connecting shafts 22 are fixedly disposed on the connecting member 212, and the plurality of connecting shafts 22 and the plurality of planetary gears 422 are connected in a one-to-one correspondence. By the arrangement, the connecting piece 212 and the planetary gear train 42 are connected through the connecting shaft 22, the transmission reliability is guaranteed, and the connecting shafts 22 are connected with the planetary gears 422 in a one-to-one corresponding mode, so that the structural strength of the connecting positions in the transmission process is improved, and the connection reliability and the transmission stability are guaranteed.

Specifically, the output end of the reduction gearbox 40 is the plurality of planet wheels 422, and the connecting shaft 22 is a steel shaft structure.

Optionally, the planetary gear 422 has a connection hole, and the connection shaft 22 is inserted into the connection hole and is connected with the planetary gear 422 in a key manner.

As shown in fig. 2, the eccentric body 21 has an escape hole 23, and one end of the motor shaft 31 extends into the escape hole 23; eccentric assembly 20 further comprises first bearing 24 and driving sleeve 25, first bearing 24 is located in driving sleeve 25, first bearing 24 is sleeved on eccentric shaft 211, and driving sleeve 25 is in driving connection with diaphragm 12.

In the present embodiment, eccentric shaft 211 rotates to drive driving sleeve 25 eccentrically, thereby realizing reciprocating motion of diaphragm 12. One end of the motor shaft 31 can penetrate through the avoidance hole 23 by arranging the avoidance hole 23, so that the overall structure of the diaphragm pump is more compact. By arranging the first bearing 24, the friction coefficient between the eccentric shaft 211 and the driving sleeve 25 in the rotating process is reduced, the rotation precision is improved, and the working stability of the diaphragm pump is improved.

As shown in fig. 2, the diaphragm pump further includes a supporting portion 50 and a second bearing 61, the supporting portion 50 includes a supporting shaft 51 and a weight block 52 disposed on the supporting shaft 51, one end of the eccentric shaft 211 away from the reduction gearbox 40 is connected to the supporting shaft 51, the second bearing 61 is sleeved on the supporting shaft 51, and the second bearing 61 is disposed in the housing 11.

This prevents the eccentric shaft 211 from being in a cantilever structure, so that the end of the eccentric shaft 211 located in the pump body 10 is not supported and can not be slightly deviated during rotation. The rotational accuracy of eccentric shaft 211 is ensured by providing support portion 50. Through setting up second bearing 61, reduced the coefficient of friction between support shaft 51 and casing 11 in the rotation process, improved the gyration precision, guaranteed the stability of diaphragm pump work.

Specifically, support portion 50 and eccentric shaft 211 are riveted, and weight 52 of support portion 50 is riveted to eccentric shaft 211.

Further, the eccentric assembly 20 includes an eccentric body 21, a mounting bracket 26, a third bearing 27 and a limiting member 28, the eccentric body 21 has an annular step 29, the third bearing 27 is located in the mounting bracket 26, the third bearing 27 is sleeved on the eccentric body 21, an inner ring of the third bearing 27 abuts against the annular step 29, the limiting member 28 is disposed on the mounting bracket 26, and an outer ring of the third bearing 27 abuts against the limiting member 28. By means of the arrangement, the third bearing 27 is limited by the annular step 29 and the limiting part 28, the friction coefficient of the eccentric shaft 211 in the rotating process and between the mounting frames 26 is reduced, the rotation precision is improved, and the working stability of the diaphragm pump is guaranteed.

Specifically, the eccentric shaft 211 of the eccentric body 21 passes through the mounting bracket 26, the eccentric body 21 is fixedly connected with the reduction box 40 through the mounting bracket 26, and the limiting member 28 is a screw.

As shown in fig. 4, the diaphragm pump further includes a first fastening member 71, a second fastening member 72, a first sealing ring 73 and a second sealing ring 74, the first sealing ring 73 is disposed between the bracket 41 and the eccentric assembly 20, the bracket 41 and the eccentric assembly 20 are coupled by the first fastening member 71, the second sealing ring 74 is disposed between the housing of the inner rotor motor 30 and the bracket 41, and the housing and the bracket 41 are coupled by the second fastening member 72.

In the embodiment, the reduction box 40 and the eccentric assembly 20 are connected by the first fastening member 71, and then the reduction box 40 and the inner rotor motor 30 are connected by the second fastening member 72, so that the connection of the inner rotor motor 30, the reduction box 40 and the eccentric assembly 20 is realized. Through setting up first sealing washer 73, prevented that reducing gear box 40 and inner rotor motor 30's hookup location from appearing the clearance, through setting up second sealing washer 74, prevented that the clearance from appearing between reducing gear box 40 and the eccentric subassembly 20, prevent that fluid from flowing out from the clearance, get into the condition of reducing gear box 40 or inner rotor motor 30, guarantee the leakproofness and the reliability of diaphragm pump.

Specifically, the other end of the inner ring of the third bearing 27 abuts against the second seal ring 74, the first fastener 71 and the second fastener 72 are both screws, the first seal ring 73 is a rectangular ring structure and is disposed between the bracket 41 and the mounting bracket 26, the second seal ring 74 is an annular structure, one end of the bracket 41 close to the inner rotor motor 30 is provided with a seal groove, and the second seal ring 74 is disposed in the seal groove and abuts against the end face of the inner rotor motor 30.

Specifically, the motor shaft 31 of the inner rotor motor 30 is fixedly connected with the input gear 421, the input gear 421 enters the cavity of the support 41 through the communication hole and is engaged with the planetary gear train 42 in the cavity of the support 41, and the plurality of connecting shafts 22 of the eccentric assembly 20 are connected with the plurality of planetary gears 422 of the planetary gear train 42 in a one-to-one correspondence manner. Through opening inner rotor motor 30, motor shaft 31 and input gear 421 rotate jointly, input gear 421 and the meshing of a plurality of planet wheels 422, drive a plurality of planet wheels 422 rotation and revolve round motor shaft 31 and rotate, and then drive a plurality of connecting axles 22 and rotate round motor shaft 31, drive the eccentric body 21 of being connected with connecting axle 22 and rotate, realize the rotation of eccentric shaft 211, the eccentric rotation of rethread setting at the driving sleeve 25 of eccentric shaft 211 one end, the reciprocating motion of the diaphragm 12 of the pump body 10 has finally been realized.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A diaphragm pump, comprising:

a pump body (10), the pump body (10) comprising a housing (11) and a diaphragm (12) movably disposed within the housing (11);

an eccentric assembly (20), the eccentric assembly (20) being drivingly connected to the diaphragm (12) to drive the diaphragm (12) to and from;

an inner rotor motor (30);

the input end of the reduction box (40) is connected with a motor shaft (31) of the inner rotor motor (30), and the output end of the reduction box (40) is connected with the eccentric component (20).

2. The diaphragm pump according to claim 1, wherein the reduction gearbox (40) comprises a carrier (41) and a planetary gear set (42) rotatably arranged within a cavity of the carrier (41), the motor shaft (31) and the planetary gear set (42) being in driving connection, at least a part of the eccentric assembly (20) being arranged within the carrier (41), the eccentric assembly (20) and the planetary gear set (42) being connected.

3. The diaphragm pump of claim 2,

the planetary gear train (42) comprises an input gear (421) and a plurality of planetary gears (422), the planetary gears (422) are arranged around the input gear (421), the planetary gears (422) are all meshed with the input gear (421), the inner side wall of the support (41) is provided with annular inner teeth (411), the planetary gears (422) are all meshed with the annular inner teeth (411), and the motor shaft (31) is fixedly connected with the input gear (421).

4. The diaphragm pump according to claim 3, characterized in that the reduction gearbox (40) further comprises a wear ring (43), the wear ring (43) being arranged in a cavity of the carrier (41), the wear ring (43) abutting against one end of a planet wheel (422).

5. The diaphragm pump according to claim 2, characterized in that the eccentric assembly (20) comprises an eccentric body (21), the eccentric body (21) being rotatably arranged, the eccentric body (21) comprising an interconnected eccentric shaft (211) and a coupling member (212), the coupling member (212) being coupled to the planetary gear set (42).

6. The diaphragm pump according to claim 5, wherein the planetary gear train (42) comprises a plurality of planetary gears (422), the eccentric assembly (20) further comprises a plurality of connecting shafts (22), the plurality of connecting shafts (22) are fixedly arranged on the connecting member (212), and the plurality of connecting shafts (22) and the plurality of planetary gears (422) are connected in a one-to-one correspondence.

7. The diaphragm pump of claim 5,

the eccentric body (21) is provided with an avoidance hole (23), and one end of the motor shaft (31) extends into the avoidance hole (23);

the eccentric assembly (20) further comprises a first bearing (24) and a driving sleeve (25), the first bearing (24) is located in the driving sleeve (25), the first bearing (24) is sleeved on the eccentric shaft (211), and the driving sleeve (25) is in driving connection with the diaphragm (12).

8. The diaphragm pump according to claim 5, further comprising a support portion (50) and a second bearing (61), wherein the support portion (50) comprises a support shaft (51) and a weight block (52) arranged on the support shaft (51), one end of the eccentric shaft (211) far away from the reduction gearbox (40) is connected with the support shaft (51), the second bearing (61) is sleeved on the support shaft (51), and the second bearing (61) is arranged in the housing (11).

9. The diaphragm pump according to claim 1, characterized in that the eccentric assembly (20) comprises an eccentric body (21), a mounting frame (26), a third bearing (27) and a stop (28), the eccentric body (21) having an annular step (29), the third bearing (27) being located within the mounting frame (26), the third bearing (27) being sleeved on the eccentric body (21), an inner ring of the third bearing (27) abutting the annular step (29), the stop (28) being provided on the mounting frame (26), an outer ring of the third bearing (27) abutting the stop (28).

10. The diaphragm pump according to claim 2, further comprising a first fastener (71), a second fastener (72), a first seal ring (73), and a second seal ring (74), the first seal ring (73) being disposed between the bracket (41) and the eccentric assembly (20), the bracket (41) and the eccentric assembly (20) being connected by the first fastener (71), the second seal ring (74) being disposed between a housing of the inner rotor motor (30) and the bracket (41), the housing and the bracket (41) being connected by the second fastener (72).

Images